CN217688749U

CN217688749U - Accurate autosampler of ration

Info

Publication number: CN217688749U
Application number: CN202221341637.3U
Authority: CN
Inventors: 董宁; 万峰; 王在彬; 白洪海; 戴煦
Original assignee: Centre Testing International Group Co ltd
Current assignee: Centre Testing International Group Co ltd; Zhongshan Huace Testing Technology Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-10-28
Anticipated expiration: 2032-05-31

Abstract

The utility model relates to the technical field of experimental equipment, and disclose an accurate auto-sampler of ration, solved the volume that can't accurately take a sample, the data result problem of follow-up test is easily influenced, it includes the bottom plate, the top symmetry of bottom plate installs the stock solution section of thick bamboo, and the top of bottom plate is installed the movable plate, and the top of movable plate is installed the lifting unit, and the internally mounted of lifting unit has the ration imbibition subassembly, and the ration imbibition subassembly includes the pipette of pegging graft in the top of stock solution section of thick bamboo, and the top of pipette is installed the installation cover, and the internally mounted of installation cover has the second motor, and the screw rod is installed to the output shaft bottom of second motor; the utility model discloses, in operation, through the movable block rebound that sets up to with the locating lever contact position time, the movable block can't continue rebound this moment, and the volume of sample is the product of distance and imbibition pipe internal diameter of movable block rebound promptly to play the effect of accurate measurement, thereby guarantee follow-up detected data's accuracy nature.

Description

Accurate autosampler of ration

Technical Field

The utility model belongs to the technical field of the experimental facilities, specifically be an accurate autosampler of ration.

Background

In the chromatographic experiment analysis, the device that can be quantitative send into the chromatographic column to the sample, called the injector, the injector has divided into artifical manual injector and auto-sampler two kinds, and the auto-sampler is exactly an intelligent, automatic sampling instrument, only needs to set up the appearance parameter, puts into and waits to detect the sample, can accomplish the autoinjection process, and current device passes through lead screw motor, and control pipette needle rises or descends to the sample has been realized.

However, this sampling mode may not accurately sample the volume, and thus the data result of the subsequent test is easily affected.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned condition, for overcoming prior art's defect, the utility model provides an accurate auto-injector of ration, the effectual volume of having solved unable accurate sample easily influences the problem of the data result of follow-up test.

In order to achieve the above purpose, the utility model provides a following technical scheme: an automatic sample injector with accurate quantification comprises a bottom plate, wherein liquid storage cylinders are symmetrically arranged at the top end of the bottom plate, a moving plate is arranged at the top end of the bottom plate, a lifting assembly is arranged at the top end of the moving plate, and a quantitative liquid suction assembly is arranged at the top end of the bottom plate;

the quantitative liquid suction assembly comprises a liquid suction pipe inserted at the top end of the liquid storage cylinder, and an installation sleeve is installed at the top end of the liquid suction pipe.

Preferably, the second motor is installed inside the installation sleeve, the screw rod is installed at the bottom end of the output shaft of the second motor, the screw rod penetrates into the pipette, and the non-contact type bubble sensor is installed on the inner wall of the pipette.

Preferably, the bilateral symmetry of pipette has seted up the constant head tank, and the inside grafting of constant head tank has the locating lever, and the spacing groove has been seted up to the symmetry on the inner wall of pipette, and the inside movable mounting of pipette has the movable block, and the bilateral symmetry of movable block installs the stopper, and the stopper is pegged graft in spacing inslot portion.

Preferably, the bottom end of the moving block is provided with a connecting rod, the bottom end of the connecting rod is provided with a piston, the piston is in sliding connection with the liquid suction pipe, the top end of the moving block is provided with a thread groove, and the thread groove is in threaded connection with the second motor.

Preferably, the lifting assembly comprises an installation block installed at the top end of the movable plate, a sliding groove is formed in one side of the installation block, a sliding block is connected to the inside of the sliding groove in a sliding mode, and a spiral groove is formed in one side of the sliding block.

Preferably, the mounting block is internally provided with a first motor, the top end of an output shaft of the first motor is provided with a screw rod, and the screw rod is matched with the spiral groove.

Preferably, a connecting block is installed on one side of the sliding block and is fixedly connected with the installation sleeve.

Compared with the prior art, the beneficial effects of the utility model are that:

1) During work, when the moving block moves upwards to a position where the moving block is in contact with the positioning rod, the moving block cannot move upwards continuously, and the sampling amount is the product of the distance of the moving block moving upwards and the inner diameter of the liquid suction pipe, so that the effect of accurate measurement is achieved, and the accuracy of subsequent detection data is guaranteed;

2) In the work, the output shaft of the second motor through setting up drives the spacing groove and rotates, because the thread groove threaded connection on spacing groove and the movable block, and the movable block receives the spacing of stopper and spacing groove, drives the movable block rebound for the piston rebound back, with the sample solution suction liquid intraduct in the liquid storage cylinder, thereby make things convenient for the solution sample.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention.

In the drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the lifting assembly of the present invention;

fig. 3 is a schematic view of a pipette structure of the present invention;

FIG. 4 is a schematic view of the quantitative liquid suction assembly of the present invention;

fig. 5 is a schematic view of the structure of the moving block of the present invention.

In the figure: 1. a base plate; 2. a liquid storage cylinder; 3. moving the plate; 4. a lifting assembly; 401. mounting blocks; 402. a chute; 403. a first motor; 404. a screw rod; 405. a slider; 406. a helical groove; 407. connecting blocks; 5. a dosing pipette assembly; 501. a pipette; 502. installing a sleeve; 503. a second motor; 504. a screw; 505. positioning a groove; 506. positioning a rod; 507. a limiting groove; 508. a moving block; 509. a limiting block; 510. a connecting rod; 511. a piston; 512. a non-contact bubble sensor; 513. a spiral groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the first embodiment, as shown in fig. 1 to 5, the utility model discloses a bottom plate 1, liquid storage cylinders 2 are symmetrically installed on the top of bottom plate 1, movable plate 3 is installed on the top of bottom plate 1, lifting unit 4 is installed on the top of movable plate 3, and quantitative liquid suction unit 5 is installed on the top of bottom plate 1.

In the second embodiment, on the basis of the first embodiment, the quantitative liquid absorbing assembly 5 includes a liquid absorbing pipe 501 inserted into the top end of the liquid storage cylinder 2, a mounting sleeve 502 is installed at the top end of the liquid absorbing pipe 501, a second motor 503 is installed inside the mounting sleeve 502, a screw rod 504 is installed at the bottom end of an output shaft of the second motor 503, the screw rod 504 penetrates into the liquid absorbing pipe 501, a non-contact bubble sensor 512 is installed on the inner wall of the liquid absorbing pipe 501, positioning grooves 505 are symmetrically formed in two sides of the liquid absorbing pipe 501, positioning rods 506 are inserted into the positioning grooves 505, limiting grooves 507 are symmetrically formed in the inner wall of the liquid absorbing pipe 501, a moving block 508 is movably installed inside the liquid absorbing pipe 501, limiting blocks 509 are symmetrically installed on two sides of the moving block 508, the limiting blocks 509 are inserted into the limiting grooves 507, a connecting rod 510 is installed at the bottom end of the moving block 508, a piston 511 is installed at the bottom end of the connecting rod 510, the piston 511 is slidably connected with the liquid absorbing pipe 501, a spiral groove 513 is formed in the top end of the moving block 508, and the spiral groove 513 is in threaded connection with the second motor 503;

when sampling, the positioning rod 506 is inserted into the corresponding positioning groove 505 by the amount of required sampling, the second motor 503 is started at this time, so that the output shaft of the second motor 503 drives the limiting groove 507 to rotate, the limiting groove 507 is in threaded connection with the thread groove 513 on the moving block 508, and the moving block 508 is limited by the limiting block 509 and the limiting groove 507, so that the moving block 508 is driven to move upwards after the screw 504 rotates, and then the sample solution in the liquid storage cylinder 2 is sucked into the pipette 501 after the piston 511 moves upwards, when the moving block 508 moves upwards to the contact position with the positioning rod 506, the moving block 508 cannot continue to move upwards at this time, and the amount of sampling is the product of the distance of the upward movement of the moving block 508 and the inner diameter of the pipette 501, so that the accurate measurement is realized.

In the third embodiment, on the basis of the first embodiment, the lifting assembly 4 includes an installation block 401 installed at the top end of the moving plate 3, a sliding groove 402 is formed in one side of the installation block 401, a sliding block 405 is connected to the inside of the sliding groove 402 in a sliding manner, a spiral groove 406 is formed in one side of the sliding block 405, a first motor 403 is installed inside the installation block 401, a lead screw 404 is installed at the top end of an output shaft of the first motor 403, the lead screw 404 is matched with the spiral groove 406, a connection block 407 is installed at one side of the sliding block 405, and the connection block 407 is fixedly connected with the installation sleeve 502;

when the height of the pipette 501 needs to be adjusted, the first motor 403 is started at the moment, so that after the first motor 403 is electrified, the output shaft of the first motor 403 drives the screw rod 404 to rotate, the screw rod 404 is in threaded connection with the sliding block 405, then the screw rod 404 is driven to move downwards after rotating, and then the pipette 501 is driven to stretch into the liquid storage cylinder 2, so that the solution sampling is facilitated.

The working principle is as follows: during operation, firstly, when the height of the liquid suction pipe 501 needs to be adjusted, the first motor 403 is started at the moment, after the first motor 403 is powered on, the output shaft of the first motor 403 drives the screw rod 404 to rotate, the screw rod 404 is in threaded connection with the sliding block 405, then the screw rod 404 drives the sliding block 405 to move downwards after rotating, and then the liquid suction pipe 501 is driven to extend into the liquid storage cylinder 2, so that the solution sampling is facilitated;

when sampling, the positioning rod 506 is inserted into the corresponding positioning groove 505 by the amount of required sampling, the second motor 503 is started at the moment, so that the output shaft of the second motor 503 drives the limiting groove 507 to rotate, the limiting groove 507 is in threaded connection with the thread groove 513 on the moving block 508, the moving block 508 is limited by the limiting block 509 and the limiting groove 507, so that the moving block 508 is driven to move upwards after the screw 504 rotates, the piston 511 is driven to move upwards, the sample solution in the liquid storage cylinder 2 is sucked into the pipette 501, when the moving block 508 moves upwards to the contact position with the positioning rod 506, the moving block 508 cannot continue to move upwards at the moment, the sampling amount is the product of the upward movement distance of the moving block 508 and the inner diameter of the pipette 501, so that the accurate measurement effect is achieved, and the accuracy of subsequent detection data is ensured.

Claims

1. The utility model provides an accurate autosampler of ration, includes bottom plate (1), its characterized in that: the quantitative liquid suction device is characterized in that liquid storage cylinders (2) are symmetrically mounted at the top end of the bottom plate (1), a moving plate (3) is mounted at the top end of the bottom plate (1), a lifting assembly (4) is mounted at the top end of the moving plate (3), and a quantitative liquid suction assembly (5) is mounted at the top end of the bottom plate (1);

the quantitative liquid suction assembly (5) comprises a liquid suction pipe (501) inserted at the top end of the liquid storage cylinder (2), and a mounting sleeve (502) is mounted at the top end of the liquid suction pipe (501).

2. The autosampler of claim 1, wherein: the installation sleeve (502) is internally provided with a second motor (503), the bottom end of an output shaft of the second motor (503) is provided with a screw rod (504), the screw rod (504) penetrates into the pipette (501), and the inner wall of the pipette (501) is provided with a non-contact bubble sensor (512).

3. The autosampler of claim 1, wherein: locating slot (505) have been seted up to the bilateral symmetry of pipette (501), and the inside of locating slot (505) is pegged graft and is had locating lever (506), and spacing groove (507) have been seted up to the symmetry on the inner wall of pipette (501), and the inside movable mounting of pipette (501) has movable block (508), and stopper (509) are installed to the bilateral symmetry of movable block (508), and stopper (509) are pegged graft in spacing groove (507) inside.

4. The autosampler of claim 3, wherein: the bottom end of the moving block (508) is provided with a connecting rod (510), the bottom end of the connecting rod (510) is provided with a piston (511), the piston (511) is in sliding connection with the liquid suction pipe (501), the top end of the moving block (508) is provided with a thread groove (513), and the thread groove (513) is in threaded connection with the second motor (503).

5. The accurate-quantitative autosampler of claim 1, wherein: the lifting assembly (4) comprises an installation block (401) installed at the top end of the moving plate (3), a sliding groove (402) is formed in one side of the installation block (401), a sliding block (405) is connected to the inside of the sliding groove (402) in a sliding mode, and a spiral groove (406) is formed in one side of the sliding block (405).

6. The autosampler of claim 5, wherein: a first motor (403) is installed inside the installation block (401), a screw rod (404) is installed at the top end of an output shaft of the first motor (403), and the screw rod (404) is matched with the spiral groove (406).

7. The accurately quantified autosampler of claim 5, wherein: and a connecting block (407) is installed on one side of the sliding block (405), and the connecting block (407) is fixedly connected with the installation sleeve (502).